In the teams at Dorchester the following hand was of interest in both bidding and play.
Hilary and Chris were the only pair to bid to the par conract of 7♣ with the auction shown. 4♣ was Roman Key Card Blackwood with clubs agreed and 5♦ asked for specific kings.
I know you shouldn't argue with success, but maybe North should have bid RKCB directly over 3♣. I expect that most Souths would have bid 3♠ over 3♦, and then any subsequent RKCB bid would have assumed spades as trumps.
In 7♣ you have twelve top tricks and a heart ruff for the thirteenth. But the question in the bar afterwards was whether you could make 7NT if West makes the most awkward lead of a heart. The winning line is to run six club tricks, discarding a diamond and three spades (unblocking the 10) from dummy. West cannot afford to throw a diamond or a spade, as a spade discard would allow declarer to take three spade tricks by a finesse against East. So West must throw all his hearts, and now three rounds of diamonds squeeze East in the majors. Click on 'Next' in the diagram to follow the play.
This type of squeeze, where a player needs to keep a holding to prevent his partner being finessed, is called a guard squeeze. To be more precise, it's a double guard squeeze, similar to the second example here http://en.wikipedia.org/wiki/Guard_squeeze
